Aims: A systematized review aimed to identify the impact of basic electrocardiogram (ECG) training courses on qualified nurses. Background: ECG plays a crucial role in helping to diagnose, follow-up, and detect any abnormalities in patients' conditions. Nurses often work on the frontline in hospitals and are the ones who initially assess patients' conditions. According to the British Heart Foundation (n. d), 26% of all mortality in the UK is attributable to heart and circulatory diseases. Methodology: A comprehensive, systematized review was undertaken using the AMED, EMBASE, CINAHL, and MEDLINE databases. Thematic analysis was then used to synthesis the findings from the studies selected. Ten papers were selected following the application of inclusion and exclusion criteria. Conclusion: Basic ECG training courses were found to improve nurses' knowledge, compared to those who did not possess ECG training, the quality of care was seen better among nurses who had received ECG courses, and even patient outcomes were improved in the total number of myocardial infarction events in hospital which was decreased compared to before the intervention. Cardiac care nurses had better ECG interpretation skills than other nurses regardless if they took ECG courses or not.